3123542645 has 4 divisors (see below), whose sum is σ = 3748251180. Its totient is φ = 2498834112.

The previous prime is 3123542633. The next prime is 3123542693. The reversal of 3123542645 is 5462453213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1869178756 + 1254363889 = 43234^2 + 35417^2 .

It is a cyclic number.

It is not a de Polignac number, because 3123542645 - 2⁴ = 3123542629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312354260 + ... + 312354269.

It is an arithmetic number, because the mean of its divisors is an integer number (937062795).

Almost surely, 2^3123542645 is an apocalyptic number.

It is an amenable number.

3123542645 is a deficient number, since it is larger than the sum of its proper divisors (624708535).

3123542645 is an equidigital number, since it uses as much as digits as its factorization.

3123542645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624708534.

The product of its digits is 86400, while the sum is 35.

The square root of 3123542645 is about 55888.6629380235. The cubic root of 3123542645 is about 1461.7815627346.

Adding to 3123542645 its reverse (5462453213), we get a palindrome (8585995858).

The spelling of 3123542645 in words is "three billion, one hundred twenty-three million, five hundred forty-two thousand, six hundred forty-five".